1550897473 has 2 divisors, whose sum is σ = 1550897474. Its totient is φ = 1550897472.

The previous prime is 1550897417. The next prime is 1550897479. The reversal of 1550897473 is 3747980551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930738064 + 620159409 = 30508^2 + 24903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550897473 - 2²¹ = 1548800321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1550897479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775448736 + 775448737.

It is an arithmetic number, because the mean of its divisors is an integer number (775448737).

Almost surely, 2^1550897473 is an apocalyptic number.

It is an amenable number.

1550897473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550897473 is an equidigital number, since it uses as much as digits as its factorization.

1550897473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 1550897473 is about 39381.4356391435. The cubic root of 1550897473 is about 1157.5178477345.

The spelling of 1550897473 in words is "one billion, five hundred fifty million, eight hundred ninety-seven thousand, four hundred seventy-three".